Drill steel retainer



July l2, 1932. 1 L. RICHARDSON DRILL STEEL RETAINER Filed May 31, 1929 2Sheets-Sheet l July 12, 1932. RlCHARDSON 1,866,863

DRILL `STEEL RETAINER Filed May 3l, 1929 2 Sheets-Sheet 2 j,Aff'c/zarasaw.

Patented July 12, 1932 UNITED STATES PATENT OFFICE LED L. RICHARDSON, orCLEVELAND, OHIO, AssIGNon. ro THD CLEVELAND ROCK DRILL COMPANY, or'CLEvELAND,`omO, A CORPORATION or OHIO DRILL STEEL RETAINER Thisinvention relates to pneumatic tools and more particularly toimprovements in v drill steel retainers for iiuid actuated drills.

An object of the invention is to provide a device of the character soconstructed that accidental ejection of the drill steel from the fronthead is positively prevented.

`Another object of the invention is to provide a device of thischaracter so constructed that the retainer may be quickly and easilymanipulated to permit a drill steel to be re-- moved or re laced.

Another o ject of the invention is to provide a device of thischaracterwhich is simple in construction durable, eliicient in operationand one which may be manufactured at a relatively small cost.

These andy other objects and an understanding ofthe invention itself andthe merits W thereof, will be had by reference to the followingdescription and the accompanying drawings forming a part of thisspecification.

In the drawings:

Fig. 1 is a fragmentary elevational view of a pneumatic drill withcertain parts broken .away and shown in section;

Fig. 2 is a perspective view, showing the parts prior to assembly;

Fig. 3 is an elevational view, showing the retaining sleeve partiallyenveloping the front head;

Fig. 4 is a sectional view taken on line 4--4 of Fig. 1. y v

Referring to figures of the drawings wherein like parts lare designatedby li e reference characters, there is shown the cylinder 1 of a fluidpressure actuated drill which has associated therewith a front vhead 2.The front head has an annular shoulder 3 serving as an abutment for theend of a helical spring 4 which is adapted .to be telescopically engagedwith the end of the head. A pair of diametrically opposed longitudinalgrooves 5 are also provided in the surface of the head and are adapted,to receive therein the lugs 13 of a drill retaining sleeve 6 and 17 ofa collar 15.

The end of the drill retaining sleeve is formed with' a slot 7 whichextends longitudinally and communicates with a circular aperture 8 inthe side of the sleeve. The other end of the slot provides' a radialopening 10 in the end'of the sleeve which is adapted to accommodate theshank 11 of a drill. A seat 9 is provided in the forward end of thesleeve contiguous the opening 10 and engages an integral annular collar12, of the A drill.

The end 21 of the sleeve is provided with inwardly extending lugs 13which are adapted to slide in the grooves 5 of the head when the sleeveis telescopically engaged with the head. Lateral grooves 14 connect withthe grooves 5 and the lugs'13 are adapted to coo erate therewith in amanner to be hereina ter explained.

. The locking collar l5, which is adapted to be disposed about the headand flange 3, has its forward end provided with an inturned annularflange 16 against which an end of the spring 4 may hear. A pair ofoppositely disposed lugs are provided on the flange which extendinwardly at 17 adapted to slide in the slot 5 on the head,

and forward at 18, to project into recesses 19 in the rear edgeof thesleeve 6. The spring i engages the flanges 16 of the collar 3 of thehead to normally press the collar forward or to the right as viewed inthe figures.

The drill 11 is coupled or engaged in the retaining sleeve 6, before thesame is connected to the front head, by passing the end of the drillthrough `the aperture 8 and the rear opening of the sleeve in suoli amanner that the collar or flange 12 on the drill aligns with theaperture 8 wherein the drill 11 and Iflange 12 will readily slipdownward into the sleeve, the slot 10 accommodating the Ashank 11 andthe aperture 8 allowing the collar 12 to pass there through. The drillmay then be advanced in the sleeve, the reduced bore 9 accommodating theflange 12 and the drill being retained within the sleeve g5 by theinturned end wall 20 thereof.

When the drill has been properly adjusted in the sleeve, the assemblymay be aligned with the front head 2, wherein the drill shank will be ina position to enter the chuck.

gaged The sleeve 6 is then telescoped on the head and forced rearwardagainst the collar 15, moving the same backward against the pres sure ofthe spring 4, the lugs 13 and 17 sliding rearward in the grooves 5,linto alignment with the lateral grooves 14.

In this position the sleeve may be rotated and the lugs 13 may enter thegrooves 14, at

.which time the recesses 19 align with the lugs 18 which snap int-o therecesses. The sprin g 4 presses the collar forward snapping the lugsinto the recesses 19, thereb eiecting the retention of the sleeve upon te head. Since the lugs 13 are now disposed in the lateral grooves 14,and the lugs 17 are enb 1 the groove 5, relative lateral andlongitudinal movement of the sleeve and head is prevented and thedrill'is securely retained in operative relation to the head.

When it is desired to remove the sleeve to replace the drill, thecollarmay be pressed backward against the pressure of the vspring 4 todisengage the lugs 18 of the collar from the recesses 19 of the sleeve,and the sleeve may then be rotated to move the lugs 13 from the grooves14, whereupon the sleeve may be slid off of the head.

Having thus described my invention in an embodiment thereof, I am awarethat numerous and extensive departure may be made therefrom but withoutdeparting from the spirit of my invention.

I claim: I Y

1. A drill tool retainer having means cooperating with the-iront head ofa drill for detachably! securing the retainer thereto, a. passage in theretainer adapted to pass the shank of a tool and to prevent passage ofan abutment on the tool shank, an aperture in the side of the retainerconnecting with the passage, said aperture permittin insertion of thetool and abutment carried t ereby, the

aperture being closed by the front head of the `drill when the retaineris secured thereto.

2. A drill tool retainer havin means cooperating with the ro'nt head o?a drill for detachably securing the retainer thereto, a passage in theretainer adapted to pass the shank of a tool and to prevent passage ofan abutment on the tool shank, an aperture in the side of the retainerconnecting with the passage, said aperture permitting insertion of thetool and abutment carried thereby passage'in the retariner adapted topass the the aperture being closed by the front head oi the 'l Lacasse`ock the retainer against disen passage in the retainer adapted to passthe p shank of a tool and to prevent passage of an abutment on the toolshank, an aperture in the side of theretainer connecting with thepassage, said, aperture permittin insertion of the tool and abutmentcarried t ereby, the aperture being closed by the front head of thedrill when the retainer is secured thereto,

said retainer being joined to the drill by a bayonet-type of joint, andal spring pressed member s idably and non-rotatably mounted on the drilladapted to engage the retainer when in secured position to hold theretainer against such rotation as would disengage the latter.

In testimony whereof I hereunto ai'x my signature this 27th da of May,1929.

LED RICHARDSON.

shank of a tool and to prevent passage of an abutment on the tool shank,an aperture 1n the side'of the retainerconnecting with the i passage,said aperture permitting insertion

